Receptacle closure and method of producing the same



June 14, L. MEROLLE 1 RECEPTACLE CLOSURE AND METHOD OF PRODUCING THESAME Filed Aug. "r. 1955 YINVENTOR ustus L. Mel-022a Patented June 14,1938 PATENT OFFICE RECEPTACLE CLOSURE AND METHOD OF PRODUCING THE SAMEAugustus L. Merolle, Brooklyn, N. Y., assignor'to Empire Metal Cap 00.,Inc., Brooklyn, N. Y., a corporation of New York Application August 7,1933, Serial No. 684,061

14 Claims.

This invention relates to a receptacle closure and to a method by whichto produce said closure.

An object of the invention is to provide a closure formed from a singlepiece of sheet materlal bent into suitableshape providing threadformations interiorly thereof by which it may be screwed onto areceptacle but there being no evidence exteriorly of the closure of theexistence of said thread formation.

A further object is to provide a closure as indicated and in which thethread formations are of the "continuous thread" type, as distinguishedfrom the "lug type, thereby adapting the closure for screw engagementonto receptacles having so-called continuous threads.

A further object is to provide a closure as indicated and which will beof great strength and rigidity so that it will not 'be likely to beobjectionably distorted at any time and so that it may be screwed toextreme tightness onto a receptacle without likelihood of stripping ofthe threads of the closure.

A further object is to so construct the closure that it will provideunusually effective means for retaining a sealing gasket in operativeposition therein. A

A further object is to so construct the closure that no raw edge ofmetal will be visible either interiorly or exteriorly of the closure.

A further object is to so construct the closure that its side wall orapron portion for surrounding the receptacle will be of double thicknesswith the two thicknesses suitably spaced to constitute an admirableprotection cushion against injury of the mouth portion of thereceptacle.

A further object is to so construct the closure that its inner annularthreaded surface throughout will bear the same surface finish as theexterior surface of the closure.

A further object is to provide a novel method of producing a receptacleclosure.

Other objects and aims of the invention, more or less specific thanthose referred to above, will be in part obvious and in part pointed outin the course of the following description of the elements,combinations, arrangements of parts and applications of principlesconstituting the invention; and the scope of protection contem platedwill be indicated in the appended claims.

In the accompanying drawing which is to be taken as a part of thisspecification, and in which I have shown merely a preferred form ofembodiment of the invention:

Flg. 1 is a side elevationalview of a closure constructed in accordancewith this invention, a portion being broken away and shown in verticalsection.

Fig. 2 is a bottom plan view of the portion of the structure appearingin Fig. 1, said view being taken substantially from the plane of lineII-II of Fig. 1.

Fig. 3 is a top plan view of the portion of the closure appearing inFig. 1, with part broken away and shown in horizontal sectionsubstantially upon the plane of line III-III of Fig. 1.

Figs. 4, 5 and 6 are diagrammatic detail sectional views takensubstantially upon the plane of lines IV-IV, VV and VI--VI of Fig. 2.

Figs. 7, 8, 9, 10 and 11 are diagrammatic detail views illustratingprogressive steps followed according to the improved method of producingthe closure, and

Fig. 12 is an elevational view, partly in section, illustrating theoperation of the thread forming means illustrating a manner of operatingthe thread forming means appearing in Figs. 10 and 11.

Referring to the drawing for describing in detail the invention as showntherein, the reference character L indicates a top Wall portion of theclosure, the reference character G indicates the outer cylindrical wallpart of the annular skirt portion of the closure and the referencecharacter H indicates the inner wall part of the annular skirt portionof the closure.

The top wall portion and the outer wall part of the skirt portion may beperfectly plain or may be ornamented with color or embossing, orotherwise, as preferred by the manufacturer.

The inner wall part H extends, as an inturned part of the outer wall,from the lower margin of the skirt upwardly to near the under surface ofthe top wall portion. It may of course extend entirely to said undersurface if desired but it preferably stops short of said under surfaceand thereby provides an annular recess as l withinthe closure into whichmay extend the annular marginal portion of a gasket or liner disc or thelike 2, as clearly indicated, the gasket or liner being therebyefliciently held against accidental displacement from within the closureat all times.

The gasket or liner 2 may be wedged into position after the metallicportions of the closure have been completed or it may be placed withinthe closure prior to bending in the inner wall part H. When insertedprior to the bending in of the wall part H said wall part may be causedto press firmly against the marginal portion of the'gasket or liner toclamp it against the inner surface of the top wall and thereby even moresecurely hold The inner wall part H is spaced inwardly from the innersurface of the wall part G so that the .wall part G is thereby at alltimes held spaced away from any solid engagement with the receptacle. Inthe event of a blow being struck against the outer surface of the wallpart G the spacing of the wall part G from the wall part H willconstitute the wall G as an eflicient cushion sufficiently yieldable forthe protection of the receptacle. The wall part G may even be dented toan appreciable extent by the blow into the space between the two wallparts without the blow being felt locally by the receptacle.

If the ornamentation of wall G is made to include any bending of saidwall inwardly toward the wall H such inwardly bent portions may bereadily accommodated in the space between the walls G and H.

The connecting portion of metal at the lower annular edge of theclosure, that is the connecting portion 4, rounds smoothly downwardlyand inwardly from the cylindrical portion of the wall G and thenceupwardly to merge into the lower annular portion of the wall H. Itprovides a positive connection between the two spaced walls and servesas an eificient reinforcement against distortion of either of the wallout of their true annular form.

The cross sectional arcuate curvature of the connecting portion 4between the cylindrical portion of the wall G and the substantiallylowermost point on the portion 4, that is of the portion 5, see Figs. 4to 6, is substantially constant at all points around the circumferenceof the skirt, thereby presenting a smoothly rounding lower corner forthe wall G as viewed from exteriorly of the closure. There is noevidence whatever present exteriorly of the closure concerning theexistence of the threaded interior surface of the closure.

The cross sectional arcuate curvature of the portion 4 from saidlowermost point inwardly and upwardly of the closure, that is of theportion 6, see Fig. 4, is substantially equal to the cross sectionalarcuate curvature above mentioned of the portion 5, except where saidinner portion is bent in the formation of the threads 3, as clearlyillustrated in the drawing, Figs. 2 and 4 to 6, Fig. 4 showing thenormal contour of the portions 5 and 6, Figs. 5 and 6 showing theportion 5 unchanged but showing the portion of metal referred to as theportion 6 now bent up in the formation of the threads 3 wholly withinthe inner portion of the closure and concealed from vision exteriorly ofthe closure.

The upper annular edge portion of the wall part H is turned outwardly toprovide a flaring flange as at i so that the raw edge as 8 of the metalis presented facing approximately toward, and sometime engaging against,the inner surface of the wall part G.

The flange portion i is of course rigidly connected with the upperannular marginal part of wall H and, by its flaring dispositionconstitutes an efficient reinforcement for the upper portion of saidwall H against distortion out of true circular form, being efllcientalso asreinforcement for the closure as a whole and definitely anduniformly spacing the upper portion of wall H from the inner surface ofwall G.

In Figs. 7 to 12 is illustrated the several essential steps proposedherein as the method by which to produce the structure above described.

Having provided a piece of sheet metal and forming it with an annularflange portion as B somewhat more than twice as deep as the flange orwall portion G in the finished closure, as illustrated in Fig. 7, thefirst operation thereon, as illustrated in Fig. 8 is that of turning upfrom the edge portion ll! of the flange 9 an inturned annular wire edgeI I.

Then, as illustrated in Fig. 9, the wire edge II is bumped in thedirection of the top wall portion L so that more of the material of theflange 9 is made to flow inwardly and upwardly toward the wall L, thewire edge being in effect elongated in that direction, and therebyproviding a smooth flat inner annular wall I! spaced in parallelrelation interiorly of the outer wall or flange which now constitutesthe outer wall part G hereinabove referred-to; 'It will be observed thatthe inner wall i2 is of less diameter than the outer wall sothat themetal which flows in from the greater circumference of the outer wallinto the less circumference of the inner wall must flow together orupset as the outer wall is rolled inwardly, to accommodate the sameamount of metal in a less circumference- This, it would seem probable,results in a slight thickening of the inner wall but such thickening isimperceptible and the foregoing is merely theoretical as to what takesplace. This bumping operation may be accomplished in a suitable manner,for instance, of so curving the bumping die used in the formation of thewire edge II that it will cause the extreme edge of the metal formingthe wire edge to face toward and impinge directly against the innersurface of the flange 9 when the wire edge is completed. The edge of themetal forming along the surface 9, instead of curling round and round,as the bumping operation is continued.

Then the material of the portion I 2 is bent to form spiral corrugationstherein serving as continuous threads interiorly of the closure, therebycompleting the inner threaded wall H hereinabove referred to.

The manner of bending the wall i2 to form the threads therein is clearlyindicated in the drawing Figs. 10 to 12. The method here illustratedincludes the use of a die roller mounted to rotate freely upon a spindlel4 carried by a slide member I5 so as to be capable of traversing thewall l2 in a direction toward and away from the top wall of the closureas best indicated by reference to the full and dotted line positions ofthe roller l3 as pictured in Fig. 12.

The closure is mounted in a suitable carrier l6 so as to rotate withsaid carrier and is intended to be rotated first in one direction for agiven distance and then backwardly in the opposite direc-- tion. Mountedupon the spindle ll of carrier I6 is shown a gear is and a suitablelost-motion connection is provided between the carrier and the gear, asfor instance by means of a pin l9 connected with the gear and engagingwithin a loose slot 20 formed upon the carrier, the carrier and the gearhaving free rotary movement with respect to each other about the axis ofspindle H within the limits of movement of the pin I! within the slot20.

. the wire edge will in this way be caused to slide Meshing with thegear I8 is a second gear 2| which is rotatably mounted upon a threadedshaft 22. The shaft 22 is non-rotatably but longitudinally slidablymounted in suitable bearings as 23 and 24 and the gear 2| is interiorlythreaded to mate the threads of the shaft so that the shaft will becaused to travel longitudinally within the bearings 23 and. incident torotation of the gear 2| and 'flrst in one direction and then in theopposite direction according to the direction of rotation of the gear2|.

\ The slide member I is fixed rigidly upon the shaft 22 to move back andforth therewith at all times. q

At 25 is shown a suitable power supply which it will be understood is ofa character to rotate the gear I3 back and forth a proper distance ineach direction.

The ratio of the gears I3 and 2| and the pitch of the threads of shaft22 is usually, although not necessarily, such that approximately onecomplete rotation of the receptacle closure will be sufllcient to causethe roller I3 to move inwardly sufficiently to traverse the entire widthof the wall I2, a similar reversed rotation likewise being sufilcient toreturn the roller to its original position.

As the roller I3 progresses inwardly from its full line position in Fig.12 and engages the moving surface of the material of the closure theroller will be thereby made to rotate by friction and to meanwhile bendor dent a pathway for itself along the wall I2. After the roller hasreached its final inward position as shown by the dotted lines in Fig.12 then the direction of rotation of the receptacle closure and thedirection of travel of the roller is reversed, by reversal of the drivegear 25, and the roller then retreats backwardly along approximately thesame channel or thread groove which it formed in entering.

During the time while the roller was entering the receptacle closure thepin I3 was bearing against the end wall 26 of the slot 2|] and continuedto so bear until the inward limit was reached and the driver 25 wasreversed. At the moment of reversal the pin I3 left the wall 26 andtravelled the length of the slot 20 into engagement with the oppositeend wall as 21 of said slot before beginning reversed rotation of thecarrier IS. A period of rest for the carrier I3, and hence for thereceptacle closure, occurred during which the roller I3 was movingoutwardly. From this it will be seen that the roller I3, instead ofretracing outwardly the exact same groove which it formed along the wallI2 when moving inwardly, now forms a substantially new groove in soclose parallelism with the first groove as to have the practical effectof broadening the first groove.

This principle of forming two grooves merging together so that in thefinished article they merge into a single thread groove of increasedwidth is important for the reason that it provides for displacement of asufllcient amount of material of the wall I2 to define an amply widethread groove for properly co-operating with the thread lugs of thereceptacle, only a portion of the material of the wall I2 beingdisplaced while the roller travels in one direction, as illustrated inFig. 10, and the remainder necessary for completing the thread groovebeing displaced while 'theroller travels in the opposite direction, see

While the roller is moving inwardly of.

Fig. 11.

the closure it is called upon to displace, or bend out, a lesser amountof the material of wall I2 than it would be called upon if the full sizeof thread groove were completed during this travel of the roller. Lessstrain isplaced upon the material of the wall I2 and a sharper and moreclean cut bend of said material is obtained so that when the thread iscompleted it is of good form and adequately prominent to maintain apositive and eflicient grip upon the thread rib or lug of thereceptacle.

The connecting portion 4 and the flange I greatly re-inforces the wallI2 against undesirable distortion during the time while the roller I3 isoperating thereon to form the thread groove.

It is further of importance to note that the initial engagement of theroller I3 against the material of the closure, that is as said rollermoves from its full line position Fig. 12 into engagement with theclosure, the pressure of the roller against the material of the closureis in a direction toward the top wall L of the closure, as well asradially outwardly of the closure, and that due to the pressure exertedtoward the top wall L the material of the closure first displaced by theroller is urged in the direction of the wall L thereby preserving a,smooth and unbroken line marking the lowermost point or edge, as 4, ofthe closure. Except forthe pressure of the roller I3 toward wall L whenfirst engaging the material of the closure the displaced material of theclosure might be simply squashed radially of the closure and result inthe formation of an undulating or wavy line, instead of the straightline marking the lower edge of the closure.

From the shape and manner of forming the closure as herein disclosed itwill be apparent that any enamel or other surface finish as 28oocurring'upon the outer surface of the piece of material forming theflange 9 will be carried inwardly of the closure and occur also upon theinner threaded surface of the wall H in the fin ished closure, therebygiving to the closure as a whole the appearance of being formed fromsolid molded material rather than from coated sheet metal or the like,it being noted in this connec' tion that the under surface of the topwall L of the closure is usually covered and concealed by the gasket orliner member as shown.

As many changes could be made in this construction without departingfrom the scope of the invention as defined in the following claims, itis intended that all matter contained in the above description, or shownin the accompanying drawing, shall be interpreted as illustrative onlyand notin a limiting sense.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:-

1. A single piece receptacle closure comprising a top wall, a marginalcylindrical wall turned in wardly at its lower margin and thenceupwardly to form an inner wall, said inner wall being bent to form athread groove therein and being spaced inwardly from the cylindricalwall, and having a flange at its upper annular edge projecting outwardlythereof to adjacent the cylindrical wall, said flange being in additionto the thread and serving to support the said inner wall during thethreading operation.

2. A single piece receptacle closure comprising a top wall portion and askirt portion, the skirt portion consisting of an outer annular wall andspaced apart substantially uniformly throughout the circumference of theclosure, the lower marginal portions of the two walls being connectedtogether in spaced relation by an integral connecting portion of saidwalls, and the upper marginal portion of the inner wall having anintegral part bent outwardly therefrom substantially into engagementwith the outer wall, said outwardly bent marginal portion beingadditional to the thread and serving to support the said inner wall inthe threading operation.

3. A single piece receptacle closure comprising a top wall, a marginalcylindrical wall turned inwardly at itslower marginand thence upwardlyto form an inner wall, said inner wall being bent to form a threadgroove therein and being spaced inwardly from thecylindrical wall, andhaving its upper marginal part turned outwardly to dispose its raw edgeof metal in a concealed and protected position facing the inner surfaceof the cylindrical. wall at a location adjacent to the top wall, saidoutwardly turned marginal part being additional to the thread andserving to support the said inner wall during the threading operation.

4. The herein disclosed method of producing a receptacle closure, whichconsists in shaping a piece of sheet metal to form a top wall portionand a marginal annular flange thereon, bending thelower edge portion ofsaid flange to form an inturned wireedge thereon, bumping said wire edgein the direction of the top wall to thereby cause portions of thematerial of the flange to flow inwardlyand form an annular wall spacedinwardly from the inner surface of the flange and substantiallyconcentric with said flange, and then applying pressure radiallyoutwardly against the inner surface of said Wall thereby bending thematerial of the wall and forming a thread groove in the inner surface ofsaid wall.

5. The herein disclosed method of producing a receptacle closure, whichconsists in shaping a piece of sheet metal to form a top wall portionand a marginal annular flange thereon, bending the lower edge portion ofsaid flange to form an inturned wire edge thereon, bumping said wireedge in the direction of the top wall to thereby cause portions of thematerial of the flange to flow inwardly and form an annular wall spacedinwardly from the inner surface of the flange and substantiallyconcentric with said flange, and then causing a die roller to roll alongsaid wall in forced engagement therewith and in a general directioncircumferentially of said wall so as to bend the material of the walland form a thread groove therein.

6. The herein disclosed method of producing a receptacle closure, whichconsists in shaping a piece of sheet metal to form atop wall portion anda marginal annular flange. thereon, bending the lower edge portion ofsaid flange to form an inturned wire edge thereon, bumping said wireedge in the direction of the top wall and thereby cause portions of thematerial of the flange to flow inwardly and form an annular wall spacedinwardly from the inner surface of the flange and substantiallyconcentric with said flange, and then causing a die roller to roll alongsaid wall in forced engagement therewith and in a general directioncircumferentially of said wall first in one direction to partially forma thread groove in said wall and then in the opposite direction tocomplete the formation of said thread groove.

'7. The herein disclosed method of producing a receptacle closure, whichconsists in shaping a piece of sheet metal to form a top wall portionand a marginal annular flange thereon, bending the lower'edge portion ofsaid flange to form an inturned wire edge thereon, bumping said wireedge in the direction of the top wall to thereby cause portions of thematerial of the flange to flow inwardly and form an annular wall spacedinwardly from the inner surface of the flange and substantiallyconcentric with said flange, and then causing a die roller to roll alongsaid wall in forced engagement therewith and in a general directioncircumferentially of said wall so as to bend the material of the walland partially form a thread groove therein, and then causing a dieroller to similarly rollalong said wall following a path parallel withbut slightly removed from the path. of the first rolling thereby tocomplete the formation of the thread groove.

8. The herein disclosed method of producing a receptacle closure, whichconsists inshaping a piece of sheet metal to form a top wall portion anda marginal annular flange thereon, bending the lower edge portion ofsaid flange to form an inturned wire edge thereon, bumping said wireedge in the direction of the top wall to thereby cause portions of thematerial of the flange to flow inwardly and form an annular wall spacedinwardly from the inner surface of' the flange and substantiallyconcentric with said flange, and then forming a thread groove in saidinner wall by rolling a die roller therealong in paths slightly removedfrom each other thereby to partially form said thread grooves at eachrolling.

9. The herein disclosed method of producing a receptacle closure, whichconsists in shaping a piece of sheet metal to form a top wall portionand a marginal annular flange thereon, bending the lower edge portion ofsaid flange to form an inturned wire edge thereon, bumping said wireedge in the direction of the top wall to thereby cause portions of thematerial of the flange to flow inwardly and form an annular wall spacedinwardly from the inner surface of the flange and substantiallyconcentric with said flange, and then causing a die roller to engage theannular edge portion of said wall farthest removed from the top wall andto move toward said top wall in forced engagement with the inner surfaceof said annular wall while the closure is being rotated, said rollerthereby bending radially outwardly portions of the material of saidannular wall to form a thread groove in said annular wall.

10. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall, the said inner wall having a thread formed in it andhaving its top marginal portion bent outwardly and adapted to engage theouter wall of the skirt to support the inner wall spaced from said outerwall during the threading operation, the length of said inner wallaxially of the closure being greater than the distance between saidinner and outer walls at any point.

11. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall connected to the outer wall of the skirt by a radiallycurved portion, said inner wall having a thread formed in it and havingits top marginal portion bent outwardly and adapted to engage thecylindrical outer wall of the skirt to support the inner wall spacedfrom said outer wall during the threading ope ation, the said outwardlybent portion of the inner wall being spaced, axially oi the closure,from the said radially curved con necting portion.

12. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall, the said inner wall having a thread formed in it andhaving its top marginal portion bent outwardly and adapted to engage theouter wall of the skirt to support the inner wall spaced from said outerwall, the length of said inner wall axially of the closure being greaterthan the distance between said inner and outer walls at any point.

13. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall connected to the outer wall of the skirt by a radiallyPatent No 2,120 61 6.

curved portion, said inner wall having a thread formed in it and havingits top marginal portion bent outwardly and adapted to engage thecylindrical outer wall of the skirt to support the inner wall spacedfrom said outer wall, the said outwardly bent portion of the inner wallbeing spaced, axially of the closure, from the said radially curvedconnecting portion.

14. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall connected to the outer wall of the skirt by a radiallycurved portion, said inner wall having a thread formed in it and havingits top marginal portion bent outwardly into a radially curved portion,the free side 01 which is adapted to engage the cylindrical outer wallof the skirt to support the inner wall spaced from said outer wall, thesaid outwardly bent portion of the inner wall-being spaced, axially ofthe closure, from the said radially curved connecting portion.

AUGUSTUS L. MEROLLE.

June '11,, 19 8.

AUGUSTUS L. MEROLLE.

It is hereby certified that the above numbered issued to EmpirelletalCap 00., Inc.

in said invention, ventor, Augustus L.

New York, a corporation of New York one-half interest only, fice;

patent was erroneously as assigrlee of the entire interest whereas saidpatent shouldhavebeen issued to the in? Merol'le and Empire Metal Cap00., Inc. of Brooklyn, said corporation being assignee of as shown bythe record of assignments in this ofand. that the said Letters Patentshouldbe read with this correction therein that the same may conform tothe record of the case in the Patent Office Signed and sealed this 25rdday of Augu'st,'A. D. 19

(Seal) Leslie Frazer Acting Commissioner of Patents.

tion bent outwardly and adapted to engage the cylindrical outer wall ofthe skirt to support the inner wall spaced from said outer wall duringthe threading ope ation, the said outwardly bent portion of the innerwall being spaced, axially oi the closure, from the said radially curvedcon necting portion.

12. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall, the said inner wall having a thread formed in it andhaving its top marginal portion bent outwardly and adapted to engage theouter wall of the skirt to support the inner wall spaced from said outerwall, the length of said inner wall axially of the closure being greaterthan the distance between said inner and outer walls at any point.

13. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall connected to the outer wall of the skirt by a radiallyPatent No 2,120 61 6.

curved portion, said inner wall having a thread formed in it and havingits top marginal portion bent outwardly and adapted to engage thecylindrical outer wall of the skirt to support the inner wall spacedfrom said outer wall, the said outwardly bent portion of the inner wallbeing spaced, axially of the closure, from the said radially curvedconnecting portion.

14. A single piece receptacle closure comprising a top and asubstantially cylindrical marginal skirt depending therefrom, said skirthaving its bottom marginal portion turned inwardly and upwardly to forman inner wall connected to the outer wall of the skirt by a radiallycurved portion, said inner wall having a thread formed in it and havingits top marginal portion bent outwardly into a radially curved portion,the free side 01 which is adapted to engage the cylindrical outer wallof the skirt to support the inner wall spaced from said outer wall, thesaid outwardly bent portion of the inner wall-being spaced, axially ofthe closure, from the said radially curved connecting portion.

AUGUSTUS L. MEROLLE.

June '11,, 19 8.

AUGUSTUS L. MEROLLE.

It is hereby certified that the above numbered issued to EmpirelletalCap 00., Inc.

in said invention, ventor, Augustus L.

New York, a corporation of New York one-half interest only, fice;

patent was erroneously as assigrlee of the entire interest whereas saidpatent shouldhavebeen issued to the in? Merol'le and Empire Metal Cap00., Inc. of Brooklyn, said corporation being assignee of as shown bythe record of assignments in this ofand. that the said Letters Patentshouldbe read with this correction therein that the same may conform tothe record of the case in the Patent Office Signed and sealed this 25rdday of Augu'st,'A. D. 19

(Seal) Leslie Frazer Acting Commissioner of Patents.

